what would you do?

Ca
This is not meant to be anything political so please don't turn it into that. Several weeks ago my friend and I bought bus tickets to go to the women's march on Washington on 1/21. Were in upstate ny - the bus leaves around midnight Friday night, drives all night, march most of the day on Saturday 1/21 and leaves that evening to return probably around midnight the Saturday. I'm currently 5 weeks pregnant.. I'll be 10 weeks at the time of the march. I'm in good shape, a distance runner before i got pregnant. I've been having a lot of spotting but this happened with my first pregnancy as well and it's being monitored. Last time it stopped around 8-10 weeks. 
What would you do? Would you go on the march still? I want to decide soon because I don't want my friend to have to go alone - we bought ticket together because we wanted to have a buddy system, and I want to give her time to find someone to go with if i decide not to go...